Pinch bar



Nov. 11, 1930. H. M. HOWE 1,781,329

PINCH BAR Filed March 21, 1928 Patented Nov. 11, 1930 UNITED STATESPATENT OFFICE PIN CH BAR Application filed March 21, 1928. Serial No.263,508.

The object of this invention is to provide a device especiallyadaptedfor use in moving railway cars for short distances, where no other poweris available.

A further object is to provide a bar having a spur mounted in a specialmanner and affording an especial grip, the construction also permittingof the use of several different portions or edges of the device, as theedges be come worn, so that but little difficulty is experienced inkeeping the tool in good condition.

A further object is to provide a pinch bar having a bore extending atany desired angle serving the purpose, or having a plurality of suchbores, a spur or spurs-being mounted within the bore or bores andretained by set screws, and retained by additional means if desired.

With the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements described,illustrated and claimed, it being understood that modifications may bemade within the scope of the claims, without departing from the spiritof the invention.

In the drawings forming part of this application,

Figure 1 is a view in elevation, showing the lower portion of a pinchbar, with the spur mounted therein, a portion of the latter being indotted line.

Figure 2 is a ure 1. V

Figure 3 is a perspective view of the spur, or of the preferred form,this device constituting a cylindrical element.

Figure 4 is a furtl'ier section through the section on line 2--2 of Figfoot portion of the bar, but showing an adjustment diiierent from thatin Figure 2, in

' order to provide for the proper position of the spurs when the lowerend has been worn away through use and by grinding.

Figure 5 is a perspective view showing another form of spur, this devicebeing rectangular in cross section.

Figure 6 shows a spur triangular in cross section.

Figure 7 illustrates a hexagonal spur. The shank of the bar isdesignated 10, and

the foot portion is shown at 11, this bar being provided with a bore orbores, one of the latter being shown at 12, in Figure 2, and posi tionedcentrally with reference to opposite side portions of the foot 11. i 55Various forms of mounting the spur 13 may be resorted to, but I haveillustrated a spur held in position by set screw 14, and by a threadedelement 15, constituting a headless screw engaging the walls of thebore.

The spur 13 is of cylindrical form in Fig urcs l, 2, and 3, but may beof various other forms, or having a different cross section asillustrated in the remaining views of the drawing. The cylindrical spurmay readily berotated in the bore, upon loosening the set screw, and maybe adjusted to a great variety of new positions, so that when theangular portion or edge has been worn through use, a new edge may beprovided, without regrinding. When the spur is considerably worn andthereby shortened, the adjusting screw 15 is employed for impartinglongitudinal thrust and securing the proper extent of projection at thelower end. 75

Figure 4 shows the use of a plurality of washers 18 for spacing the spur13 from the upper end of the bore, it being assumed that the spur hasbeen worn down by use and by regrinding.

Figure 5 shows a spur 20, square or rectangular in cross section.

Figure 6 shows a spur 21 triangular in cross section, and Figure 7 showsa spur 22 hexagonal in cross section. All the spurs provide a pluralityof edges at the end portions thereof, so that when a corner portion hasbeen worn off, the set screw 14 may be loosened, and a new gripping edgeprovided, rm without stopping the work for grinding. The tool is used tothe best advantage by applying the toe portion at the point above thelowest point available, as the wheels rest on the rail, in order thatrotation may be imparted with the least practicable resistance. A spurof the general type herein disclosed, and mounted as indicated, willoutlast many spurs mounted horizontally, and as the set screw 14 may beadjusted with the use of the hand only, the tool is available for use atany time, many neW edge portions being available, successively, beforeregrinding becomes necessary.

What is claimed is:

1. Ina device of the class described, a

shank portion a foot member carried thereby and having a bore extendingtherethrough, the bone being at an angle with'fthe bottom of the footmember, a spur mounted in the bore, clamping means for retaining thespur,

and independent means 01 determining the position 01" the spur withreference to the lower end of the bore, said means last namedincluding athreaded device ithin the upper end of the bore said clamping means andindependent means respectively engaging the spur l movementlatera-llythereof and lengthw se 1 hereof.

2. In a (device of the class described, a

: shank portion a foot member carried thereby and having a boreextending therethrough, the borebeing at an angle iththe bottom of thefoot member, cylindrical spur mounted in the bore and hav'ing'a railengaging end V 01 substantially the cresssection of the remainder ofthespur, and means for retainingthe'spur in an adjusted position, said spurbeing rotatable .to provide a sharp angular portion at any point aroundthe edge of the an engaging end.

lntestimony whereof I mysignature.

HABRISQN M. HOWE.

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